Annotation of rat/lonwrapper.pm, revision 1.49.2.11

1.1       www         1: # The LearningOnline Network with CAPA
                      2: # Wrapper for external and binary files as standalone resources
                      3: #
1.49.2.11! raeburn     4: # $Id: lonwrapper.pm,v 1.49.2.10 2020/03/05 22:05:50 raeburn Exp $
1.4       www         5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.1       www        28: 
1.29      jms        29: 
1.1       www        30: package Apache::lonwrapper;
                     31: 
                     32: use strict;
                     33: use Apache::Constants qw(:common);
1.38      droeschl   34: use Apache::lonenc();
1.18      albertel   35: use Apache::lonnet;
1.42      raeburn    36: use Apache::lonlocal;
                     37: use Apache::loncommon();
                     38: use Apache::lonhtmlcommon();
                     39: use Apache::lonextresedit();
1.1       www        40: 
                     41: # ================================================================ Main Handler
1.21      albertel   42: sub wrapper {
1.49.2.6  raeburn    43:     my ($r,$url,$brcrum,$absolute,$is_ext,$is_pdf,$title) = @_;
1.23      albertel   44: 
1.42      raeburn    45:     my $forcereg;
                     46:     unless ($env{'form.folderpath'}) {
                     47:         $forcereg = 1;
                     48:     }
                     49: 
1.46      raeburn    50:     my %lt = &Apache::lonlocal::texthash(
                     51:                                           'noif' => 'No iframe support.',
                     52:                                           'show' => 'Show content in pop-up window',
                     53:                                         );
                     54: 
1.49.2.11! raeburn    55:     (undef,undef,undef,undef,undef,undef,my $clientmobile) =
        !            56:         &Apache::loncommon::decode_user_agent($r);
        !            57: 
1.49.2.7  raeburn    58:     my ($anchor,$uselink,$linktext);
1.49.2.2  raeburn    59:     if ($is_ext) {
                     60:         if ($env{'form.symb'}) {
                     61:             (undef,undef,my $res) = &Apache::lonnet::decode_symb($env{'form.symb'});
1.49.2.3  raeburn    62:             if ($res =~ /(#[^#]+)$/) {
1.49.2.2  raeburn    63:                 $anchor = $1;
                     64:             }
                     65:         } elsif ($env{'form.anchor'} ne '') {
                     66:             $anchor = '#'.$env{'form.anchor'};
1.49.2.1  raeburn    67:         }
1.49.2.11! raeburn    68:         unless (($is_pdf) && ($clientmobile)) {
1.49.2.6  raeburn    69:             my $hostname = $r->hostname();
                     70:             my $lonhost = $r->dir_config('lonHostID');
                     71:             my $ip = &Apache::lonnet::get_host_ip($lonhost);
                     72:             $uselink = &Apache::loncommon::is_nonframeable($url,$absolute,$hostname,$ip);
                     73:         }
1.49.2.1  raeburn    74:     }
                     75: 
                     76:     my $noiframe = &Apache::loncommon::modal_link($url.$anchor,$lt{'show'},500,400);
1.42      raeburn    77:     my $args = {'bgcolor' => '#FFFFFF'};
                     78:     if ($forcereg) {
                     79:         $args->{'force_register'} = $forcereg;
                     80:     }
                     81:     if (ref($brcrum) eq 'ARRAY') {
1.45      raeburn    82:         $args->{'bread_crumbs'} = $brcrum;
1.42      raeburn    83:     }
1.44      raeburn    84:     if ($absolute) {
1.49.2.4  raeburn    85:         $args->{'use_absolute'} = $absolute;
                     86:     }
                     87:     if ($env{'form.only_body'}) {
                     88:         $args->{'only_body'} = $env{'form.only_body'};
1.44      raeburn    89:     }
1.42      raeburn    90: 
1.49.2.8  raeburn    91:     my $headjs;
                     92: 
                     93: #
                     94: # Where iframe is in use, if window.onload() executes before the custom resize function
                     95: # has been defined (jQuery), two global javascript vars (LCnotready and LCresizedef)
                     96: # are used to ensure document.ready() triggers a call to resize, so the iframe contents
                     97: # do not obscure the Functions menu.
                     98: #
                     99: 
1.49.2.11! raeburn   100:     unless ($clientmobile || $uselink) {
1.49.2.8  raeburn   101:         $headjs = '
                    102: <script type="text/javascript">
                    103: // <![CDATA[
                    104: var LCnotready = 0;
                    105: var LCresizedef = 0;
                    106: // ]]>
                    107: </script>'."\n";
1.49.2.9  raeburn   108:     }
1.49.2.8  raeburn   109: 
                    110:     my $startpage = &Apache::loncommon::start_page('Menu',$headjs,$args);
1.46      raeburn   111:     my $endpage = &Apache::loncommon::end_page();
1.38      droeschl  112: 
1.49.2.6  raeburn   113:     if (($uselink) && ($title eq '')) {
                    114:         if ($env{'form.symb'}) {
                    115:             $title=&Apache::lonnet::gettitle($env{'form.symb'});
                    116:         } else {
                    117:             my $symb=&Apache::lonnet::symbread($r->uri);
                    118:             if ($symb) {
                    119:                 $title=&Apache::lonnet::gettitle($symb);
                    120:             }
                    121:         }
                    122:     }
1.49.2.11! raeburn   123:     if ($clientmobile) {
1.47      raeburn   124:         my $output = $startpage;
                    125:         if ($is_pdf) {
1.49.2.6  raeburn   126:             $linktext = &mt('Link to PDF (for mobile devices)');
                    127:             $output .= &create_link($url,$anchor,$title,$linktext);
1.47      raeburn   128:         } else {
1.49.2.6  raeburn   129:             if ($uselink) {
                    130:                 $linktext = &mt('Link to resource');
                    131:                 $output .= &create_link($url,$anchor,$title,$linktext);
                    132:             } else {
                    133:                 my $dest = &HTML::Entities::encode($url.$anchor,'&<>"');
                    134:                 $output .= '<div style="overflow:scroll; -webkit-overflow-scrolling:touch;">'."\n".
                    135:                            '<iframe src="'.$dest.'" height="100%" width="100%" frameborder="0">'."\n".
                    136:                            "$lt{'noif'} $noiframe\n".
                    137:                            "</iframe>\n".
                    138:                            "</div>\n";
                    139:             }
1.47      raeburn   140:         }
                    141:         $output .= $endpage;
                    142:         return $output;
1.49.2.6  raeburn   143:     } elsif ($uselink) {
                    144:         $linktext = &mt('Link to resource');
                    145:         return $startpage.&create_link($url,$anchor,$title,$linktext).$endpage;
1.46      raeburn   146:     } else {
1.49.2.3  raeburn   147:         my $offset = 5;
                    148:         &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['inhibitmenu']);
                    149:         if ($env{'form.inhibitmenu'} eq 'yes') {
                    150:             $offset = 0;
                    151:         }
1.46      raeburn   152:         my $script = &Apache::lonhtmlcommon::scripttag(<<SCRIPT);
                    153:         \$(document).ready( function() {
                    154:             \$(window).unbind('resize').resize(function(){
1.49.2.3  raeburn   155:                 var header = null;
                    156:                 var offset = $offset;
1.46      raeburn   157:                 var height = 0;
                    158:                 var hdrtop = 0;
                    159:                 if (\$('div.LC_head_subbox:first').length) {
                    160:                     header = \$('div.LC_head_subbox:first');
                    161:                     offset = 9;
                    162:                 } else {
                    163:                     if (\$('#LC_breadcrumbs').length) {
                    164:                         header = \$('#LC_breadcrumbs');
                    165:                     }
                    166:                 }
1.49.2.3  raeburn   167:                 if (header != null && header.length) {
1.46      raeburn   168:                     height = header.height();
                    169:                     hdrtop = header.position().top;
1.42      raeburn   170:                 }
1.46      raeburn   171:                 var pos = height + hdrtop + offset;
                    172:                 \$('.LC_iframecontainer').css('top', pos);
                    173:             });
1.49.2.8  raeburn   174:             LCresizedef = 1;
                    175:             if (LCnotready == 1) {
                    176:                 LCnotready = 0;
                    177:                 \$(window).trigger('resize');
                    178:             }
1.38      droeschl  179:         });
1.49.2.8  raeburn   180:         window.onload = function(){
                    181:             if (LCresizedef) {
                    182:                 LCnotready = 0;
1.49.2.9  raeburn   183:                 \$(window).trigger('resize');
1.49.2.8  raeburn   184:             } else {
                    185:                 LCnotready = 1;
                    186:             }
                    187:         };
1.39      droeschl  188: SCRIPT
1.46      raeburn   189:         # javascript will position the iframe if window was resized (or zoomed)
                    190:         return <<ENDFRAME;
                    191:         $startpage
                    192:         $script
                    193:         <div class="LC_iframecontainer">
1.49.2.1  raeburn   194:             <iframe src="$url$anchor">$lt{'noif'} $noiframe</iframe>
1.46      raeburn   195:         </div>
                    196:         $endpage
1.38      droeschl  197: ENDFRAME
1.46      raeburn   198:     }
1.21      albertel  199: }
                    200: 
1.49.2.6  raeburn   201: sub create_link {
                    202:     my ($url,$anchor,$title,$linktext) = @_;
                    203:     my $shownlink;
                    204:     if ($title eq '') {
                    205:         $title = $env{'form.title'};
                    206:         if ($title eq '') {
                    207:             unless ($env{'request.enc'}) {
                    208:                 ($title) = ($url =~ m{/([^/]+)$});
                    209:                 $title =~ s/(\?[^\?]+)$//;
                    210:             }
                    211:         }
                    212:     }
                    213:     unless ($title eq '') {
                    214:         $shownlink = '<span style="font-weight:bold;">'.$title.'</span><br />';
                    215:     }
                    216:     my $dest = &HTML::Entities::encode($url.$anchor,'&<>"');
                    217:     $shownlink .= '<a href="'.$dest.'">'.$linktext.'</a>';
                    218:     return $shownlink;
                    219: }
                    220: 
1.21      albertel  221: sub handler {
                    222:     my $r=shift;
                    223:     &Apache::loncommon::content_type($r,'text/html');
                    224:     $r->send_http_header;
                    225: 
                    226:     return OK if $r->header_only;
                    227: 
1.38      droeschl  228:     my $url = $r->uri;
1.49.2.5  raeburn   229:     my ($is_ext,$brcrum,$absolute,$is_pdf,$cdom,$cnum,$hostname);
1.38      droeschl  230: 
                    231:     for ($url){
                    232:         s|^/adm/wrapper||;
1.49.2.8  raeburn   233:         $is_ext = $_ =~ s|^/ext/|http://|;
1.49.2.10  raeburn   234:         s|http://https://|https://| if ($is_ext);
1.49.2.8  raeburn   235:         s|&colon;|:|g;
1.21      albertel  236:     }
                    237: 
1.47      raeburn   238:     if ($url =~ /\.pdf$/i) {
                    239:         $is_pdf = 1;
                    240:     }
                    241:  
1.42      raeburn   242:     if ($is_ext) {
                    243:         &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.49.2.2  raeburn   244:             ['forceedit','register','folderpath','symb','idx','title','anchor']);
1.42      raeburn   245:         if (($env{'form.forceedit'}) &&
                    246:             (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) &&
                    247:             (($env{'form.folderpath'} =~ /^supplemental/) ||
                    248:              ($env{'form.symb'} =~ /^uploaded/))) {
1.49.2.2  raeburn   249:             if ($env{'form.symb'}) {
                    250:                 (undef,undef,my $res) = &Apache::lonnet::decode_symb($env{'form.symb'});
                    251:                 if ($res =~ /(#[^#]+)$/) {
                    252:                     $url .= $1;
                    253:                 }
                    254:             } elsif ($env{'form.folderpath'} =~ /^supplemental/) {
                    255:                 if ($env{'form.anchor'} ne '') {
                    256:                     $url .= '#'.$env{'form.anchor'};
                    257:                 }
                    258:             }
1.49.2.5  raeburn   259:             if (($url =~ /^http:/) && ($ENV{'SERVER_PORT'} == 443)) {
                    260:                 $hostname = $r->hostname();
                    261:             }
                    262:             my $type = 'ext';
1.42      raeburn   263:             $r->print(
                    264:                 &Apache::lonextresedit::display_editor($url,$env{'form.folderpath'},
                    265:                                                        $env{'form.symb'},
1.49.2.5  raeburn   266:                                                        $env{'form.idx'},$type,$cdom,
                    267:                                                        $cnum,$hostname));
1.42      raeburn   268:             return OK;
                    269:         } elsif ($env{'form.folderpath'} =~ /^supplemental/) {
                    270:             my $crstype = &Apache::loncommon::course_type();
1.43      raeburn   271:             my $title = $env{'form.title'};
                    272:             if ($title eq '') {
                    273:                 $title = &mt('External Resource');
                    274:             }
1.42      raeburn   275:             $brcrum =
1.43      raeburn   276:                 &Apache::lonhtmlcommon::docs_breadcrumbs(undef,$crstype,undef,$title,1);
1.42      raeburn   277:         }
                    278:     }
                    279: 
1.21      albertel  280: #
                    281: # Actual URL
                    282: #
1.41      www       283:     if ($url=~/$LONCAPA::assess_re/) {
1.21      albertel  284: #
                    285: # This is uploaded homework
                    286: #
1.38      droeschl  287:         $env{'request.state'}='uploaded';
                    288:         &Apache::lonhomework::renderpage($r,$url);
1.21      albertel  289:     } else {
                    290: #
                    291: # This is not homework
                    292: #
1.38      droeschl  293:         if ($is_ext) {
1.49      raeburn   294:             $absolute = $env{'request.use_absolute'};
1.38      droeschl  295:             $ENV{'QUERY_STRING'} =~ s/(^|\&)symb=[^\&]*/$1/;
1.42      raeburn   296:             $ENV{'QUERY_STRING'} =~ s/\&$//;
1.38      droeschl  297:         }
                    298: 
1.35      raeburn   299:         unless ($ENV{'QUERY_STRING'} eq '') {
1.38      droeschl  300:             $url.=(($url=~/\?/)?'&':'?').$ENV{'QUERY_STRING'};
1.35      raeburn   301:         }
1.38      droeschl  302: 
                    303:         # encrypt url if not external
                    304:         &Apache::lonenc::check_encrypt(\$url) if $url !~ /^https?\:/ ;
                    305: 
1.49.2.6  raeburn   306:         $r->print( wrapper($r,$url,$brcrum,$absolute,$is_ext,$is_pdf) );
1.38      droeschl  307: 
1.21      albertel  308:     } # not just the menu
1.38      droeschl  309:     
1.21      albertel  310:     return OK;
1.13      www       311: } # handler
1.1       www       312: 
                    313: 1;
                    314: __END__
                    315: 
1.30      jms       316: =pod
1.1       www       317: 
1.30      jms       318: =head1 NAME
                    319: 
                    320: Apache::lonwrapper - External and binary file management.
                    321: 
                    322: =head1 SYNOPSIS
                    323: 
                    324: Wrapper for external and binary files as standalone resources. Edit handler for rat maps; TeX content handler.
                    325: 
                    326: This is part of the LearningOnline Network with CAPA project
                    327: described at http://www.lon-capa.org.
                    328: 
                    329: =head1 Subroutines
                    330: 
                    331: =over
                    332: 
1.49.2.6  raeburn   333: =item wrapper($r,$url,$brcrum,$absolute,$is_ext,$is_pdf,$title))
1.30      jms       334: 
1.45      raeburn   335: =over
                    336: 
1.49.2.6  raeburn   337: =item $r
                    338: 
                    339: request object
                    340: 
1.46      raeburn   341: =item $url
                    342: 
1.45      raeburn   343: url to display by including in an iframe within a
                    344: LON-CAPA page which has a standard LON-CAPA inline menu.
                    345: 
                    346: =item $brcrum
                    347: 
                    348: breadcrumbs for unregistered urls
1.42      raeburn   349: (i.e., external resources in Supplemental Content).
1.45      raeburn   350: 
1.46      raeburn   351: =item $absolute
1.45      raeburn   352: 
                    353: contains protocol (http or https) followed by
                    354: the hostname, if menu items in the standard LON-CAPA
                    355: interface created by the call to loncommon::start_page()
                    356: within &wrapper() need to use absolute URLs rather than
                    357: relative URLs.
                    358: 
                    359: That will be the case where an external resource has been 
                    360: served from port 80, when the server customarily serves
                    361: requests using Apache/SSL (i.e., port 443). mod_rewrite 
1.49      raeburn   362: is used to switch requests for external resources and
                    363: the syllabus: /public/<domain>/<courseid>/syllabus
                    364: (which might also point at an external resource)
1.45      raeburn   365: from https:// to http:// where the the URL of the remote site 
                    366: specified in the resource itself is http://.
                    367: 
                    368: This is done to avoid default mixed content blocking
                    369: in Firefox 23 and later, when serving from Apache/SSL.
                    370: 
                    371: =item $is_ext
                    372: 
                    373: true if URL is for an external resource.
                    374: 
1.47      raeburn   375: =item $is_pdf
                    376: 
                    377: true if URL is for a PDF (based on file extension).
                    378: 
1.49      raeburn   379: =item $title
                    380: 
1.49.2.11! raeburn   381: optional. If wrapped item is a PDF, and $clientmobile is true,
        !           382: a link to a PDF is shown. The "title" will be displayed
1.49      raeburn   383: above the link, but if not provided as an arg, $env{'form.title'}
                    384: will be used, otherwise, the filename will be displayed (unless
                    385: hidden URL set for the resource).
                    386: 
1.45      raeburn   387: =back
                    388: 
1.38      droeschl  389: Returns markup for the entire page.
1.30      jms       390: 
                    391: =item handler()
                    392: 
                    393: =back
                    394: 
                    395: =cut
1.1       www       396: 

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